What a Good Investment Review Looks Like After Six Months

One of the most useful habits an investor can develop is learning how to review a decision without judging it purely by the result.

Imagine you made an investment six months ago.

The price is higher.

Does that automatically mean it was a good decision?

Not necessarily.

And if the price is lower, does that automatically mean it was a bad decision?

Again, not necessarily.

A decision should be evaluated based on the information and reasoning available when it was made, as well as what happened afterward.

Six months later, I would want to revisit the original thesis.

Why did I invest?

What assumptions did I make?

What information did I believe was important?

What did I expect to happen?

Then I would compare those expectations with reality.

Which assumptions turned out to be correct?

Which were wrong?

What changed?

Were there developments that I didn't anticipate?

Has the underlying opportunity improved, weakened, or simply changed?

This process is extremely different from looking at a portfolio and asking:

“Am I making money?”

Profit and loss tells you what happened to your capital.

It doesn't necessarily tell you whether your decision-making process was strong.

You can make a poor decision that happens to produce a positive result.

You can also make a carefully researched decision that produces a disappointing short-term outcome.

If you only judge yourself by the final number, you can learn the wrong lesson.

A good investment review should therefore examine both the result and the reasoning.

It should be honest.

Not designed to prove that you were right.

Designed to understand what you can improve.

This is where keeping notes can become surprisingly valuable.

Your memory changes after the outcome is known.

Once you know what happened, it becomes very easy to convince yourself that you expected it.

Writing down your reasoning beforehand creates a record of what you actually believed.

Over many decisions, this can reveal patterns.

Maybe you consistently underestimate a particular risk.

Maybe you become too confident after a successful trade.

Maybe you spend too much time focusing on short-term information.

Maybe your strongest decisions come from situations where you have done the most research.

That is where a review becomes more than a review of one investment.

It becomes a review of yourself as a decision-maker.

And that is where long-term improvement begins.

If you reviewed your last investment today, what would you honestly say you got right and what did you misunderstand?